Aspirin Versus Clopidogrel in Chronic Coronary Syndrome in Arabian Gulf Countries (ARCTURUS-GTC-1)

May 7, 2026 updated by: Khalid F Alhabib

Aspirin Versus Clopidogrel for Secondary Prevention of Atherosclerotic Cardiovascular Events in Patients With Chronic Coronary Syndrome in the Arabian Gulf Countries: A Randomized, Open-label, Multi-Center Trial by the Gulf Trialists' Collaboration

Determine the long-term efficacy of clopidogrel compared with aspirin in reducing heart or brain attacks in patients with stable heart disease

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

6740

Phase

  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Age ≥18 years.
  2. Significant coronary artery disease (coronary angiogram documentation of Left Main artery lesion ≥50% and/or lesion(s) ≥70% in other coronary arteries, and/or FFR<0.8 or iFR<0.9).
  3. Completed at least 6 months post ACS (regardless of the bleeding risk, anti-platelet strategy, revascularization strategy "PCI, CABG, or conservative medical management only", before randomization).
  4. Agreement to give written informed consent.

Exclusion Criteria:

  1. History of hypersensitivity to aspirin or clopidogrel.
  2. Presence of non-cardiac comorbidity with life expectancy ≤2 years from randomization.
  3. Plan for surgery or intervention which requires stopping antiplatelet agents ≥3 months.
  4. Females with childbearing potential or breast-feeding.
  5. Co-administration of contraindicated medications as follows: anticoagulants (warfarin, direct oral anticoagulants (DOACs), or chronic therapy of heparin); cytochrome P450 2C19 inhibitors (fluoxetine, moclobemid or voriconazole); probenecid; high dose of methotrexate (≥15 mg/week); lithium.
  6. Inability to have a complete follow-up for up to 5 years from randomization (e.g: high possibility of travelling outside the country).
  7. Inability to afford paying for Clopidogrel out-of-pocket up to 5 years from randomization (in case not being covered by the health care system).

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Aspirin
Drug: Clopidgrel 75 mg daily
Clopidogrel
Active Comparator: Clopidogrel
Drug: Aspirin
Aspirin

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Four-point MACCE, defined as a composite of Cardiovascular Death, Non-fatal Myocardial Infarction, Non-fatal Ischemic Stroke, and Ischemia-driven Revascularization.
Time Frame: 3 years
Clinical follow-up by out-patient clinic visits or phone calls
3 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Khalid F Alhabib

Investigators

  • Principal Investigator: Khalid Alhabib, King Saud University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

April 1, 2027

Primary Completion (Estimated)

April 1, 2032

Study Completion (Estimated)

April 1, 2032

Study Registration Dates

First Submitted

April 28, 2026

First Submitted That Met QC Criteria

May 4, 2026

First Posted (Actual)

May 7, 2026

Study Record Updates

Last Update Posted (Actual)

May 11, 2026

Last Update Submitted That Met QC Criteria

May 7, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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